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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and cash equivalents [abstract]        
Cash ₩ 21,113 ₩ 19,623    
Other demand deposits 1,906,248 1,825,751    
Short-term deposits, classified as cash equivalents 1,063,290 407,921    
Short-term investments, classified as cash equivalents 244,129 381,943    
Total cash and cash equivalents ₩ 3,234,780 ₩ 2,635,238 ₩ 2,029,584 ₩ 1,810,129